pi, Betta Tan [H. H.] 1998:285, Figs. 3-4 [Ichthyological Exploration of Freshwaters v. 8 (no. 3); ref. 23321] Mae Nam Tod Deng, about 6 kilometers north of Sungai Kolok, swamps about 100-200 meters south before bridge, Narathiwat Province, Thailand. Holotype: ZRC 40289. Paratypes: CMK 12030 (3), 13025 (3); ZRC 40290-92 (2, 6, 18). •Valid as Betta pi Tan 1998 -- (Tan & Ng 2005:85 [ref. 28354], Schindler & Schmidt 2006:60 [ref. 28865], Tan 2009:501 [ref. 30388], Kottelat 2013:451 [ref. 32989], Tan & Ahmad 2018:406 [ref. 36015], Tan 2023:494 [ref. 40433]). Current status: Valid as Betta pi Tan 1998. Osphronemidae: Macropodusinae. Distribution: Southeast Asia: Narathiwat Province, Thailand. Habitat: freshwater.